Returns a new MockObjectMap where the method calls
represented by the given Activation and its nested
activations have been added as MockObjects to this map,
with the activation method call first, and the nested method calls in the
order they were added to the activation.

An EventThred traces the execution of a Java process, keeping
track of all method calls as Activations in an
ActivationList containing all root activations, that is, all
method calls that occur "magically" from outside the traced methods, for
example from the main method.